package com.mmall.concurrency.example.atomic;

import com.mmall.concurrency.annoations.ThreadSafe;

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Semaphore;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;

/**
 * Created by dingchen on 2018/7/6.
 */
@ThreadSafe
public class AtomicExample2 {

    //请求总数
    public static int clientTotal = 5000;

    //同时并发执行的线程数
    public static int threadTotal = 200;

    public static AtomicLong count = new AtomicLong(0);

    public static void main(String[] args) throws Exception{
        ExecutorService executorService = Executors.newCachedThreadPool();
        final Semaphore semaphore = new Semaphore(threadTotal);
        final CountDownLatch countDownLatch = new CountDownLatch(clientTotal);
        for(int i = 0;i<clientTotal ; i++){
            executorService.execute(() ->{
                try {
                    semaphore.acquire();
                    add();
                    semaphore.release();
                }catch (Exception e){
                    System.out.print("exception"+e);
                }
                countDownLatch.countDown();
            });
        }
        countDownLatch.await();
        executorService.shutdown();
        System.out.print("count:{}," +count.get());
    }

    private static void add(){

        count.incrementAndGet();
        //count.getAndIncrement();
    }
}
